(Treat, et. al. 2016). Neurologists at The Children’s Hospital Colorado followed 119 patients as they began treatment with various caregiver-chosen oral cannabis extracts (OCEs). Patients used the extracts for an average of 11.7 months and 71% of the patients stopped treatment during the study. Caregivers who had relocated to Colorado were more likely to perceive benefit for seizures than those who had not moved for treatment (65% vs. 38%), but that did not necessarily lead to longer use. Interestingly, patients with Dravet syndrome used OCEs for a shorter time than average. Twenty-four percent of patients’ parents reported a reduction in seizures of more than 50%. Nineteen percent reported adverse events. 

Treat, L., Chapman, KE, Colborn, KL, Knupp, KG. (2016). Duration of use of oral cannabis extract in a cohort of pediatric epilepsy patients. Epilepsia Nov 18. doi: 10.1111/epi.13617. www.ncbi.nlm.nih.gov/pubmed/27859038